<template>  
    <div class="app-container"> 
 <el-form label-width="120px">  <el-form-item label="信息描述"> 
     <el-tag type="info">excel模版说明</el-tag>  <el-tag>  
        <i class="el-icon-download"/>
        <a :href=" 
        '/static/01.xls'">
        点击下载模版</a>
          </el-tag>

 </el-form-item>

        <el-form-item label="选择Excel">
        <el-upload
        ref="upload"
        :auto-upload="false"
        :on-success="fileUploadSuccess"
        :on-error="fileUploadError"
        :disabled="importBtnDisabled"
        :limit="1"
        :action="BASE_API+'/eduservice/subject/addSubject'"
        name="file"
        accept="application/vnd.ms-excel">
        <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
        <el-button
        :loading="loading"
        style="margin-left: 10px;"
        size="small"
        type="success"
        @click="submitUpload">{{ fileUploadBtnText }}</el-button>
        </el-upload>
        </el-form-item>
        </el-form>
    </div>
</template>
<script>
export default {
    data(){
        return{
            BASE_API: process.env.BASE_API, // 接口API地址
            fileUploadBtnText: '上传到服务器', // 按钮文字
            importBtnDisabled: false, // 按钮是否禁用,
            loading: false
                
        }
    },
    created(){

    },
    methods:{
        //点击按钮上传文件到接口路面
        submitUpload(){
            this.importBtnDisabled = true
            this.loading = true
            this.$refs.upload.submit()
        },
        fileUploadSuccess(){
            //上传成功
            this.loading = false
            this.$message({
            type: 'success', 
            message: '添加课程分类成功'
            })
            //跳转课程分类列表
            this.$router.push({path:'/subject/list'})
        },
        fileUploadError(){
            //上传失败
            this.loading = false
            this.$message({
            type: 'success', 
            message: '添加课程分类失败'
            })
        }

    }
}
</script>